Insp. George Gideon
Jack Hawkins
Mrs. Kate Gideon
Anna Lee
Riley
Barry Keegan
Det. Sgt. Liggot
Frank Lawton
Sergeant Golightly
Michael Trubshawe
Mrs. Kirby
Grizelda Hervey
Rev. Mr. Courtney
Henry B. Longhurst
Rev. Julian Small
Jack Watling
Mrs. Ethel Sparrow
Maureen Potter
Feeney
Donal Donnelly
Simmo
Dervis Ward
Mrs. Saparelli
Marjorie Rhodes
Sally Gideon
Anna Massey
Arthur Sayer
Laurence Naismith
The Judge
Miles Malleson
Paul Delafield
Ronald Howard
Manners
David Aylmer
White-Douglas
Brian Smith
Mason
James Hayter
Sir Rupert Bellamy
Michael Shepley
Lady Bellamy
Joan Ingram
Barrister
John Le Mesurier
PC Simon Farnaby-Green
Andrew Ray
Joanna Delafield
Dianne Foster
Herbert 'Birdie' Sparrow
Cyril Cusack
Robert Mason
Det. Sgt. Eric Kirby
Derek Bond
The Chief
Howard Marion-Crawford
Ponsford 'The Duke'
John Loder
Director of Photography
Freddie Young
Director
John Ford
Art Direction
Ken Adam
Novel
John Creasey
Production Supervisor
Bill Kirby
Associate Producer
Wingate Smith
Original Music Composer
Douglas Gamley
Editor
Raymond Poulton
Screenplay
T. E. B. Clarke
Producer
Michael Killanin
Makeup Artist
Charles Nash